There is a new book by Anat Admati and Martin Hellwig: The Bankers’ New Clothes: What’s Wrong with Banking and What to Do about it. 

Here is their bottom line:

We have argued that if banks have much more equity, the financial system will be safer, healthier, and less distorted.  From society’s perspective, the benefits are large and the costs are hard to find; there are virtually no trade-offs.

Here is the book’s home page.  Here is Admati on YouTube.